Inorganics in air and particle phase, methanesulfonic_acid and organic tracers at Chilbolton Observatory. These measurements are gathered as a part of the following projects CAMPAIGN, EMEP and they are stored in the EBAS database (http://ebas.nilu.no/). Parameters measured are: 2-ketobutyric_acid in pm25, 3-MBTCA in pm25, 3-hydroxybutyric_acid in pm25, 4-hydroxybenzoic_acid in pm25, 4-methylphthalic_acid in pm25, 4-oxoheptanoic_acid in pm25, adipic_acid in pm25, adonitol in pm25, ammonium in pm25 (mass_concentration_of_ammonium_in_pm2p5_in_air), ammonium in pm25 (mass_concentration_of_ammonium_in_pm2p5_in_air), arabitol in pm25, azelaic_acid in pm25, benzoic_acid in pm25, calcium in pm25 (mass_concentration_of_calcium_in_pm2p5_in_air), caproic_acid in pm25, chloride in pm25 (mass_concentration_of_chloride_in_pm2p5_in_air), cis-pinonic_acid in pm25, citraconic_acid in pm25, citric_acid in pm25, fructose in pm25, gluconic_acid in pm25, glucose in pm25, glutaric_acid in pm25, glycolic_acid in pm25, glyoxylic_acid in pm25, inositol in pm25, lactic_acid in pm25, lactose in pm25, levoglucosan in pm25 (mass_concentration_of_levoglucosan_in_pm2p5_in_air), magnesium in pm25 (mass_concentration_of_magnesium_in_pm2p5_in_air), maleic_acid in pm25, malic_acid in pm25, malonic_acid in pm25, maltose in pm25, mannitol in pm25, mannose in pm25, melezitose in pm25, methanesulfonic_acid in pm25 (mass_concentration_of_methanesulfonic_acid_in_pm2p5_in_air), nitrate in pm25 (mass_concentration_of_nitrate_in_pm2p5_in_air), nitrate in pm25 (mass_concentration_of_nitrate_in_pm2p5_in_air), oxalic_acid in pm25, phthalic_acid in pm25, pimelic_acid in pm25, pinic_acid in pm25, potassium in pm25 (mass_concentration_of_potassium_in_pm2p5_in_air), pyruvic_acid in pm25, rhamnose in pm25, sebacic_acid in pm25, sodium in pm25 (mass_concentration_of_sodium_in_pm2p5_in_air), sorbitol in pm25, suberic_acid in pm25, succinic_acid in pm25, sucrose in pm25, sulphate_total in pm25 (mass_concentration_of_sulphate_total_in_pm2p5_in_air), sulphate_total in pm25 (mass_concentration_of_sulphate_total_in_pm2p5_in_air), sum_2-methyltetrols in pm25, tartaric_acid in pm25